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本文提出了一种3相6/1开关电容DC-DC升压转换器，利用两个外部浮动电容将3.3V输入升压至16V输出，在7mA负载下实现70.3%的效率，输出纹波仅为输出电压的1%。该转换器采用0.16μm CMOS工艺，芯片面积1.65mm²，通过6.67MHz的高开关频率减小电容体积，整体PCB组件体积仅为1.1mm³。
In this paper, a 3-phase switched-capacitor (SC) boost converter that uses 2 external floating capacitors to provide 16V output from a 3.3V input is presented. It achieves an efficiency of 70.3% at 7mA load current while the output ripple is 1% of the output voltage. To minimize the size of the capacitors the converter operates at a switching frequency of 6.67MHz. The chip is implemented in a 0.16μm CMOS technology and occupies 1.65mm2. The total volume of the PCB components consisting of the chip in wafer-level chip-scale package (WLSCP) and 4 external SMD capacitors (1 input, 1 output and 2 floating) is only 1.1mm3 making it attractive for space-constrained mobile applications. The volume is more than 15× smaller compared to competitive inductive converters [1-3]. The maximum thickness of the solution is 550μm. Mobile applications require a 16V supply rail providing power in the range of
Ravi Karadi, Gerard Villar Pique
NXP Semiconductors, Eindhoven, The Netherlands